-99.09% is the change from 984 to 9
Calculation steps:
[( 9 - 984 ) ÷ 984] x 100 = -99.09%
Formula
Percentage change = [(9 - 984) / 984] x 100
Subtract the new number by the original number
9 - 984 = -975
-975 ÷ 984 = -0.9908536585365854
-0.9908536585365854 x 100 = -99.09%